Key-seat-broaching machine.



No. 876,277. PATENTED JAN. '7, 1908.-

J. N. LAPOINTE. KEY SEAT BROAOHING MACHINE.

APPLICATION FILED OCT. 5, 1904.

5 SHEETSSHEET l.

Nofmmv. PATENTED JAN. 7, 1908.

J. N. LAPOINTE. 4 KEY SEAT BROAGHING MACH APPLICATION FILED OUT. 5, 1904. 1

6 SHEETS-SHEET 2.

No. 876,277, PATENTED JAN. 7, 1908.

J. N. LAPOINTE. I

KEY SEAT BROAUHING MACHINE.

APPLIUATION FILED OCT. 5, 1904.

. 6 SHEETS-SHEET 3.

PATENTED JAN. '7, 1908. J. N. LAPOINTE.

KEY SEA BROAOHING MACHINE.

5 SHBETSSHBET 1.

APPLICATION FILED OCT No. 876,277. PATENTED JAN. 7, 1908.

J. N. LAPOINTE.

KEY SEAT BROACHING MACHINE.

APPLIOATION FILED OCT. 5, 1904.

6 SHEEIS-SHEET 5.

- MTED sTATEs JOSEPH N LAPOINTE, OF BOSTON,.1\[1\.SSAGHUSETTS KEY-SEAT-BROAGHING MACHINE.

Specification of Letters Patent.

Patented Jan. 7, 1908.

Application filed October 5.1904:- Sarial No. 227.271.

To all whom it may conce'l a:

Be it known that l, Josnrn N. LAPOINTE, a citizen of the United States of America, and a resident of Boston, in the county of Sull'olk and State oil Massaclmsetts, have invented certain new and useful Improvements in Key-Seat-Breaching Machines, of which the following is a specilication. V This invention relates to key seat broaching machines and has for its object the pro duction of 'a machine in which key seats may be cut in pulleys, gears and similar articles having bores oi ditl'erent diameters, without requiring any complicated adjustments or change in the mechanism to adapt the same for the diil'erent sizes of bores in the articles to be operated upon.

It provides for a suitable mechanism for operating the working tool, insuring a steady 1novcmont during its operation, therebv ae- CUIUPliSlil llg llQbttlLl tSl li S than in mac lines now'in'gcneral use.

Provision is made for imparting to the cutting tool a slow motion during thel'orward or cutting portion of its stroke, and or automatically stopping said tool at a predetermined point, while the invention further provides tor a rapid return of the tool into its normal position preparatory to another out ting.

t l'nrthcr consists in certain novel features ol"construction and arrangement of parts which will lnrcadil understood by reference to the description of the drawings and to the claims to be hcrcinal'tcr given.

()I the drawings: Figure l represents a planet a machine embodying the features of this invention. Fig. 2 represents a rear side elevation of the same, showing the reducer partially cut in section and a gear to be operated upon mounted upon the arbor thcrcol'. .Fig. 25 represents a sectional elevation of the driving and rcvt-a-sin-g mechanisms Fig. l represents a sectional elevation of the same parts, the cutting plane being on liuo-t -l on Fig. 2-1. Fig. 5 represents an end view of the supporting plate, reduce-r and working tool. Fig. t3 rcprcscnts a sectional elevation of the tool holder and reciprocating carriage, the cutting plane being on line 66 on-Fig. 1. Fig.7 represents a sectional elevation of the same, th cutting plane being on line 7 on Fig. 6, and Fig. S represents a detail of one of thc mljustablc stops.

Similar characters designate like parts throughout the several figures of the drawmgs.

. In the drawin s, 10 represents a base provided with later-ad projections 11 and 12. The projections 12 are provided with suitable bearings 13 for elongated bushings 14. The bushings 14 have an interior bore of the same diameter as the screw 15 slidable therein. '1 he screw 15 has secured to its opposite end a carriage 16 provided with a T groove 17 in flanges 19 to [it the T groove 17. The sha 20 of the tool holder 18 is threaded and said threaded shank is provided with a clamping nut 21.

The tool holder 18 may be adjusted lengthwise of the T groove 17 into any desired sition and clamped in said adjusted POSltlOIL by means of the clamping nut 21. The outer end of the shank 2O isforked and is adapted to reccivc thc working tool, or cutter, 22 which is secured to said tool holder by means of the key 23 passing through said shank 20 and tool 22. ed in and moves freely in a groove 24 in a reducer 25 having a flanged cylindrical base fitting an opening in the sup orting plate 26. The reduccr25 is )l'OVitlOt with an arbor 26* adapted to fit a )ore through any article in which it is desired to cut a key seat.

It is obvious that the supporting plate and the opening therein always remains the saine and that it is necessary for each machine to have a pluralitv of reducers 25 provided with dill'erent sized arbors. The screw 15 has mounted thereon between the bushings 14 a nut .27, duels when revolved, operates upon said screw ll'iyto move the same end-- wise in the supporting bushings 14. These bushings serve. as guides for said screw and cause it to trove in a direct line with out jar or tremor, the opposite end of said screw' being mounted in the carriage 16 which has side grooves 28 into which is litted the guide-ways 28* on the base 10 to further steady the screw while the same is being operated to draw the working tool 22 throu h, the article being operated upon.

29 anda clamping nut 30 on either side of the bearings 13 to clamp said bushings in position to prevent endwise or other movement thereof. On one of these bushings is mounted a pulley 31. Loosely mounted 1 upon the other bushing is a driving gear 32,

which is mounted a tool holder 18 having...-

The tool 22 is mbunt- Eacdi bushing 14 is provided with a collar means of the drivi is the gear 32 meshing with and being driven by a pinion 33 on a fixed shaft 34 about which said pinion is caused to revolve by nlley 35 keyed thereto. Keyed to and sli e upon the nut .27 is a grooved clutch member 36 provided with a comics flange '37 at one end, adapted to engage'the conical hub 38 of the pulley 31 when said grooved clutch member 36 is moved by lthe lever .39 pivoted at 40 tow rd said pul The lever 39 is forked and provided with c lindrica-l rejections 41 entering the groove 42 in said 0 said clutch member to move in either direction when said lever 39 is moved about i ts pivot .40. The clutch member 36 is provided on the end cipposite the conical flange I 37 with projections 43 and the gear 32 has pivoted thereto at 44 arms 45 which are held against stop pins 16 by the 5 rings 47. The gear 32 is also provided wit 1 projections 48 in the path of said pivoted arms 45 and said arms 45 are in the path of the projections. 43 -on the sliding clutch member 36 when said clutch member has. been moved into its extreme position toward said gear 32. When in this extremeposition, the revolution of said gear 32 in-the direction of the arrow shown in Fig. 4, will cause the pivoted arms 45to come into contact with the projections 4 3 and cause said clutch member 36 to commence to revolve in the same direction as the During this operation,

ear 32 is revolving. Y

47 will gradually yield to lowever, the spring permit the pivoted arms 45 to move over is keyed a lever 52 to the -\vhicl1 a forked being keyed to clutch member 36 an the gcar32 will move together positively until said-clutch member 36 has been moved along the nut 27 to remove the projections 43 from the path of I said pivoted arms 45, This clutch mechanl ism prevents any sudden shock in the opera- I tion oft-he machine. The outer end of the l lever 39is connected by a link 49 to a lever l into cont'actxvith the rojections 48 when the 50 pivoted to ashaft 51 mounted in hearings in the base 10 and projecting through the rearthereof. To :the rear end of the shaft- 51 upper end of which is pivoted ablock' 53S0c1il0d upon a rod 54 mounted in bearings 55 in which said rod is adapted to'slide in a direction parallel with the operating screw 15.

The rod 54 is provided with a pin 55 with lever 56 en 'n'gcsfsnid lever 21' short slatt 57 passing from the rear to through the "projection 11 and having keyed l l the frontof the machine to the opposite end the operating handle 58 ,1 provider with an ordinary spring latch 59 l engaging vith'the plate (it) to hold the rod 54 in its normal. position, as shown in Fig. 2,

either of the driving mechanisms. The rod the supl 54 is provided at the end nearest utch member 36 and compelling ment of the working tool toward 1 gage with said ment of S pulleys 3l35 are driven with a stop 61in the path ejecting arm {52 on the car- Lst when the carriagefi? reaches its extreme outward position it will engage with said stop 231 and move the rod 54 to the right of Fig. 2, thereby operating the levers 52 and 39 to move the slidable clutch member 36 into its normal positionintermediate the clutch members 31, 32.

In order to operate the machine, the parts being in the position indicated in Figs. 1 and 2, the operator moves the handle 58 to the left thereby causing the clutch members 32 36 to engage and revolve the SCIQW 15 in a direction to move the carriage 16 toward the driving mechanism which is so geared down that the screw will revolve very slowly to permit a more effective cutting. This movethe driving mechanism will continue until the stop pin 63 in the projection 62 of the-carriage 16 comes into contact with the adjustable stop nlate 2e 6% on said rod 5% when the rod 54: will be in order to return the tool to its normal osition, preparatory to a'noiher cutting the liandle 58 is moved to the right to engage the clutch members 3?$8, thereby causing the screw 15 to be rapidly rotated in the opposite direction to eiiect a nick return thereof, this movement causing the carriage to to be moved toward the holder 26 until the member 62 engages the arm. 61 on the rod 54, causing a movement there clutch members 37-38 and stop further rotation of said screw .15. I

Should it be desired'to stop reverse the movement of tl s the carriage has reached the stop 61 the i justable stop 66 flattened on one side may sbe moved about the rod 5% and clamped in any desired position so that the pin 63 in its movement to the right (see Fig. 23 Will enstop so and stop the movethe screw upon contact. therewith.

The lower part of the base 10 is provided with a chamln-rior storing the extra reducers and similar articles. The upper portion of the base 10 end projection Ill and provided with a, bottom 6? inclining toward an o caring 68 beneath which a. reccp tacle may lie placed to receive the chips and oil passing down said inclined bottom and being ejected throu h said opening as. The in thesame direc tion by a belt from any suitable countershnft (not f of to disengage theis hollowed out i This mechanism produces a very effective machine for cutting key seats and slots in articles of various sizes and oi dil'i'erent bores being simple in construction and very cilective in operation.

By the; use of a screw 15 to actuate the tool holder, a'very steady movement is obtained for the cutter and as a consequence it is capable of performing much better work than can be done by cutters operated in the usual Way, by a rack and. pinion.

The driving mechanism for ac; Jating the mechanism for reciprocating the L001 holder 1 is compact .and simple, while it permits the 1 reciprocation of the tool holder to be stopped in either direction without jar or injury,

while it provides a rapid movtnnent of the 1 tool when not in operation and a slow movement when it is performing a cutting.

The ready means of securing the tool to the tool holder and the adjustability of the latter in the reciprocating carriage are other great advantages in this invention.

Having thus described my invention, I.

claim: I

1. In a keyseat breaching machine, the

combination of a tool holder; stationary bearings for said holder separated from each other; a driving member mounted upon each of said bearings; means interposed between said driving members for reciprocating said tool holder; and means for transmitting motion to said reciprocating mcansiirom either of said driving members.

2. In a keyseat broaching machine, the combination of a tool holder; stationary bearings for said holder separated from each other; a drivingpulley mounted upon one of said bearings; a gear mounted upon a second bearing; means for driving said gear; means between said gear and said dr1vinterposed mg pulley for reciprocating Silltl tool holder; and means for transmitting motion to said reciprocating means from either said driving pulley or driving gear.

3, In a keyseat combination of a tool holder; stationary bearings for said holder separated from each other; a driving pulley mounted upon one of said bearings; a gear mounted upon a second bearing; a inion meshing with said gear; a

driving pul ey therefor; means interposed between said gear and said driving pulley l'or reciprocating said tool holder, and means for transmitting motion to said reciprocating means from either said driving pulley or driving gear.

breaching machine, the

said nut having a flange adapted for engage l l i. In a l e vseat broaching machine, the l combination of a tool holder provided with a threaded portion; stationary bearings for said holder: a driving member mounted upon each of said bearings; a nut interposed between said bearings and engaging the threaded portion of said tool holder for reciprocating said tool holder; :1 slidablc clutch member ,laeyed thereto; and means for moving said clutch member to engage either of said driving members.

In a lreyseat broaching machine, the combination ol a tool holder; stationary bearings for said holder; a driving pulley l lUOtlHtttl upon one of said bearings; a gear mounted upon a. second bearing; means for driving said gear; a threaded tool holder in said bearings; a nut thereon interposed between said bearings for reciprocating said l tool holder; a slidable clutch member keyed thereto; and means For moving said clutch l i l l l member to engage either said driving pulley or driving gear.

6. in a keyseat broaching machine, the combination oi'a tool holder; bearings for said holder; at driving pulley mountedupon one of said bearings; a gear mounted upon a second bearing; a )inion meshing with said gear a driving pulley therefor; a threaded tool holder in said bearings; a nut thereon interposed between said bearings for reciprocating said tool holder; a slidable clutch member keyed thereto; and means for transmitting motion to said clutch member from either said driving pulley or driving gear.

7. in a lrcyseat broaching machine, .the combination of a tool holder; a non-revoluble screw secured thereto; guides for said holder; a work support; cylindrical bearings litting the periphery of said screw and in l which it is adapter to reciprocate; a nut lupon said screw between said bearings; a 1 driving pulley mounted upon one of said l l bearings and provided with a tapered hub; a gear mounted upon the other; a radial key in said nut; a slidable member mounted upon ment with said hub; cooperating shoulders on said slidable member and said gear and means for moving said slidablc member lengthwise of said nut.

Signed by me at Boston, Massachusetts, this 33d day of October, 1904.

JOSEPH N. LAIOIN'IE.

Wiiixrim E. LOMBARI),

l Witnessesf l 10mm 0. CLiivnLANo. 

